Made the switch way before any kind of support from steam, had several games from aspyr and feral, bought a codeweavers license and all that. For me at keast it’s about the lack of interruptions and actually enjoying the workflow on gnome. I also love the idea of fetting in touch directly with the people making the programs I enjoy and not a random support rep on the other side of the world.
On the other hand, you should probably take a deeper look at steam. There are a ton of extra modifications you can do to the client, all of them unofficial and some straight up illegal, from changing the theme to injecting enhancements on the store (e.g. displaying protondb score on store pages) to aome shady shit like unlocking DLC. Steam is DRM but it’s not denuvo or something like that. It’s easily circumventable to the point I feel safe buying games on it, knowing if they ever go for a rug pull, I could keep most if not all my stuff regardless of the platform itself.